Seminar: Dr. Tanmoy Chakrabarty, Weizmann Institute of Science

Title: SSNMR as a local probe and mechanism of enhancing NMR signal (DNP)

Event Date:

Friday, 7 April 2017 - 4:00pm

Abstract:

SSNMR is one of the local probes in modern era which can extract significant details of magnetic interactions, crystal structure, dynamic environment and various other information which is beyond the reach from the bulk probes of measurement. I'd tell a brief history of NMR and give few examples in condensed matter physics where SSNMR can successfully extract important information regarding magnetic interactions of a system. After that I'd like to show a technique called "dynamic nuclear polarization", (DNP) which can be thought as an extension of SSNMR by which we can significantly increase the population difference between nuclear levels of a system which in turn enhances the NMR signal by a huge margin. I'll also discuss the main aspects of DNP, different mechanism for attaining it. At the end, I'll briefly show few details of the work I have done on DNP in transition metal doped elements, an area of research which is still in its nascent state.